The biggest shark in the Bay is the seven-gill--with two more gill slits than the average shark. Why the extras? Well, turns out they’re probably an evolutionary accident, but these are still fascinating animals--up to 10 feet long, and swimming right out there in the Bay!

A film festival about the ocean doesn't have to look far for charisma: certain toothy creatures and wave-riding daredevils will easily draw audiences. But the San Francisco Ocean Film Festival, now in its eighth year, aspires to do more than just fill seats. Be inspired and learn what you can do to help -- March 9-13.